Abstract: The Analysis on the standing wave experiment is carried out. Reasons are found out and then some

improvements on the experiment equipment are provided. On the one hand，directly measurement of string tension

instead of the weights is introduced to measure the string tension; on the other hand，a micro-adjustment

mechanism is assembled to slightly change the length and the tension of string. Thus，experiments on relations of

string tension，wavelength，frequency and string density can be carried more accurately and conveniently.

Key words: standing wave, laboratory equipment, string tension, wavelength